You drive from CO to go to Teddy, dear god WHY?
without Teddy, there are no other national parks.
walk out to the Elkhorn site at sunrise, sit down on the banks of the muddy, and give the guy some props.
Wait till the Monarda Fistulosa is in bloom, and even then you will likely to have the place all to yourself, and that is a joy you don’t often find in many of our National Parks. I have never regretted a trip to North Dakota.